<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>


</head>
<body>
<div id="app">
    <div v‐if="score >= 90">优秀</div>
    <div v‐else‐if="score >= 80 && score < 90">良好</div>
    <div v‐else‐if="score >= 60 && score < 80">一般</div>
    <div v‐else>不及格</div>
    <div v‐show="flag">天下第一</div>
</div>



<script>
  let app = new Vue({
    el: "#app",
    data: {
        scores: 60,
        flag: true
    }
});

</script>

</body>
</html>
